1 If you went to the grocery store and bought the same thing every week, you would end up with a lot of things that you didn't need. Most people don't use a whole bottle of ketchup in one week. Milk doesn't last as long and needs to be bought more often. Each week before grocery shopping you will need to make a list.2 A list usually shows the things that you need to buy. These things will probably change from week to week. Some items will stay the same, too. Many families need to buy milk and juice every week. Or cereal may be something that you buy a lot of.3 Other items are only bought once in a while. Items like shampoo and toothpaste are bought less often. These are items that can also be written on your list.4 A list can be a piece of paper that is taped to refrigerator. When you think of an item you need, you can write it on the list. Others make lists on their computers. On the list are the items that are bought the most. These items are always on the list.